I installed a Formica Fascia on my layout and ended up with a few flaws. (see: Formica Fascia Failure) I ordered a product called SeamFil that is color matched and designed to repair Formica chip outs and fill seams. These are the results.
I’m not too happy with results. The seams did not fill. The chipouts don’t lok much better. It’s not the perfect fascia I was hoping for, but I’m going to just live with it.